Spring



. A ril 9, 1929. L. J. ROOT 1,708,684

SPRING Filed Sept. 17, 1923 all/(1% m.

)NVE/V TOR Pa ented 3,... 9,1929. I [1,708,684

UNITED STATES PATENT OFFICE;

Application filed September 17, 1923. Serial No. 863,091.

The invention is a leaf spring having a attached to the outer end of theleaf 1 by a raised portion at the center to hold the leaves link 8 asshown in dotted lines in Figure 1, longitudinally and laterally inposition and and when in position it will draw the outer grooves in theleaves through which they may end of the leaf 1 downward to about theposi be readily lubricated and also a horizontal tion shown in dottedlines in Figure 1. It 5 leaf for catching the rebound and assisting awill be seen that this will always have a tendlight load to ride as easyas a heavy load. ency to hold the ends of the spring downward The ojectof the invention is to provide a and when the spring is released quicklyas in spring with grooves whereby the spring may the caseof a reboundthe leaf 4 will tend to be readily lubricated. hold the spring downwardand thereby pre- 60 Another object of the invention is to pro- Vent itsreturning to the normal position with Vide a means whereby a leaf Springmay be a quick jerky movement. It will also be seen held in positionwithout the use of a bolt or that the leaf 4 will assist a light load ina a welded center as is now used. downward movement until the springarrives And a further object of the invention is to at a free positionof leaf 4 and from this posi- 65 '35 the grooves.

provide a means for catching the rebound tion downward it will aid thespring in carryof a spring and assisting the vehicle in riding ing theload as the tendency of the outer end with a light load so thatitwillride as easy of leaf 4 will be to move upward. It will as a heavyone, i therefore, be possible to obtain the ease while f Vith these andother ends in view theinriding with a light load that is obtained with70 vention embodies a leaf spring in which the a heavy load. leaves areprovided with grooves and oil holes The leaves are provided withlongitudinal and an extra leaf of different curvature. grooves 10 intheir centers and at the centers Other features and advantages of theinof these grooves are conical shaped sections vention will be seen fromthe following dell'which have openings 12 in their vertexes. 7

scription taken in connection with the draw T he sections 12 hold theleaves longitudinally ings, wherein V and laterally so that it will notbe necessary Figurelisaside elevation showingaspring to use a bolt inthe center of the spring as in the free position. V straps around theleaves holding the spring to Figure 2 is a longitudinal" sectionthrough, a vehicle will also hold them in position from so the centralportion of'the spring. swinging. It will also be seen that oil mayFigure 3 is a cross section through the cenbe placed in the opening 12to lubricate the ter of the spring. v leaves through the grooves 10.This will Figure 4is a detail showing the shape of make it possible toattain perfect lubrication I a v between theleaves of the spring at alltimes 85 Figure 5 is a View showing the position of and with very littletrouble. It will also be one end of the spring under load. seen that oilmay be placed in the openings Figure 6 is a view showing the position of12 with an oil can, grease cup, or any suitable one end of the springunder a heavy load 01 means. 40 shock. It is understood that although Ihave shown 90 In the drawings I have shown my spring my device embodiedin a semi-elliptical spring as it would be constructed wherein numeral 1it may be embodied in a spring of any suitindicates the upper leaf,numerals 2 and 3 the able type or design. intermediate leaves, numeral 4the extra Having thus fully described the invention, straight leaf, andnumeral 5 the short leaf what I claim as new and desire to secure by 5at the center. The outer end'ofthe leaf 1 Letters Patent, is may beattached by links 6 to a frame 7 or to In a spring, a plurality ofcurved leaves, any suitable device and when in the free posi" means atthe ends of the uppermost leaf for tionit will be in the position shownin full attaching itto an object to be supported, each lines. The outerend of the leaf 4 may be of the said successive leaves being somewhatshorter than its predecessor, another leaf at the bottom of the shortestleaf of the said I spring of substantially the same length as theuppermost or longest leaf of the said spring, 5 and suitable links forpivotally connecting the ends of the said latter leaf to the ends of thesaid uppermost leaf, the said latter leaf being substantially straightin its free post Will be slightly curved downward bythe action of thesaid latter leaf. 7

' V 1 LEMMA ROOT.

